658 GHz Vibrationally-Excited Water Masers with the Submillimeter Array

Details 658 GHz Vibrationally-Excited Water Masers with the Submillimeter Array 658 GHz Vibrationally-Excited Water Masers with the Submillimeter Array

2007-04-20

arxiv.org/abs/0704.2655v1

Astronomy and Astrophysics

Astrophysics

8 pages, 6 figures, 3 tables; based on an oral presentation at IAU conference 242: Astrophysical Masers and Their Environments

Scientific paper

10.1017/S1743921307013634

Discovered in 1995 at the Caltech Submillimeter Observatory (CSO), the vibrationally-excited water maser line at 658 GHz (455 micron) is seen in oxygen-rich giant and supergiant stars. Because this maser can be so strong (up to thousands of Janskys), it was very helpful during the commissioning phase of the highest frequency band (620-700 GHz) of the Submillimeter Array (SMA) interferometer. From late 2002 to early 2006, brief attempts were made to search for emission from additional sources beyond the original CSO survey. These efforts have expanded the source count from 10 to 16. The maser emission appears to be quite compact spatially, as expected from theoretical considerations; thus these objects can potentially be used as atmospheric phase calibrators. Many of these objects also exhibit maser emission in the vibrationally-excited SiO maser at 215 GHz. Because both maser lines likely originate from a similar physical region, these objects can be used to test techniques of phase transfer calibration between millimeter and submillimeter bands. The 658 GHz masers will be important beacons to assess the performance of the Atacama Large Millimeter Array (ALMA) in this challenging high-frequency band.

Affiliated with

Also associated with

No associations

Rating

658 GHz Vibrationally-Excited Water Masers with the Submillimeter Array does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with 658 GHz Vibrationally-Excited Water Masers with the Submillimeter Array, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 658 GHz Vibrationally-Excited Water Masers with the Submillimeter Array will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-573343